Berkeley 81
Number of stars per data source
Reference 162 : 3301 stars
References
- 162
- Sagar R., Griffiths W.K.
- (1998) Mon. Not. R. Astron. Soc. 299, 1
- BVI CCD photometry of the distant open star clusters Berkeley 81, Berkeley 99, NGC 6603 and NGC 7044
- 1998MNRAS.299....1S